package Servlets;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author asabido
 */
public class ComprobarCliente extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");

    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        try {
            String email = request.getParameter("emailCliente");
            
            String connURL= "jdbc:mysql://localhost:3306/bysDB";
            Connection conn = DriverManager.getConnection(connURL,"bys-dba","password");
            Statement stmt = conn.createStatement();

               ResultSet rset = stmt.executeQuery("SELECT ID FROM `bysDB`.`Cliente` WHERE email='"+email+"'");
               
               int count = 0;
               if (rset.next()){ count++;}
               
               if(rset != null) rset.close();
               if(stmt != null) stmt.close();
               if(conn != null) conn.close();

            response.setContentType("text/plain");
            response.setCharacterEncoding("UTF-8");
            
            
            if(count == 0)
                response.getWriter().write("Cliente no registrado");
            else if(count>0)
                response.getWriter().write("Cliente ya registrado");
        } catch (SQLException ex) {
            Logger.getLogger(ComprobarCliente.class.getName()).log(Level.SEVERE, null, ex);
        }
        
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
